It is generally not recommended to put a vape or any other electronic cigarette device in checked luggage when traveling by air, as there are potential safety risks associated with lithium-ion batteries, which are commonly used in these devices.
In the UK, the regulations for carrying e-cigarettes and related products on a flight are set by the Civil Aviation Authority (CAA). According to the CAA’s guidelines, passengers are allowed to carry electronic cigarettes and vaping devices, but they must be kept in their hand luggage and not checked in.
If you were to put a vape in checked luggage, it could potentially cause a fire if the battery is damaged, short-circuited, or exposed to heat or pressure. In addition, some airlines and airports may have their own specific rules regarding vaping devices, so it is always best to check with your airline or the airport you are departing from before you travel.